ST205 harness work with st185 Options

[wannarace]

I have a 94 celica GT and have a st185 swap in the car, current harness in there right now is messed up. My question is will a ST205 from a 1998 gt4 harness work in my 94 celica gt st185, or would it be too messy to modify the harness?

[scothaniel]

Yeah, it really does depend on what changes have already been made to the stock harnesses - especially the main body harness with the fuse block connections.The fuse blocks in the 5th and 6th gens are completely different, as are the dash connectors.

I have an ST185 with an ST205 swap, and an AT200 with a ST205(ish) swap. In my st185 car, the stock harness was heavily modified for an EMS before the motor swap, so I tried to use the spare 205 harness and fuse block. I spent days trying to map out all the fuse block and dash connectors - it was a nightmare. I was lucky and found another stock 185 harness and ditched that project.

For the AT200 (ie 7AFE model) the stock harness was far too different to use with the 3S engine. By this time, I had cut into the 205 harness for another project so I couldn't use it. I had a 3rd gen 3SGE harness which is very much like the 205 harness, just needed to add a few wires to make it into a true 205 harness. All of the fuse block and dash connectors plug right in, but a couple of wires need to be moved around to make it work. I think it would have been easier if I had a GT Celica to begin with.

One lesson I've learned with the EMS install - dont cut into the stock harnesses if possible (re-pinning is ok). I make jumper harnesses when connecting 2 different harnesses together - like when putting a 7MGTE supra motor into a 2nd gen 4runner!